Doffing-rail lock for spinning frames



I. M. HOUGHTON. DOFFING RAIL LOCK FOR SPINNING FRAMES. APPLICATION FILED MAY 29.,1920.

1,411,276; Patented Apr. 4, 1922 2 SHEETS-SHEET 1.

Z Z27 J02 Tune-c5 .l. M. HOUGHTON. DOFFING RAIL LOCK FOR SPINNING FRAMES.

1,41 1,276. APPLICATION FILED MAY 28,1920. Apr. 4,

2 SHEhIS-SHEET 2.

v r O 3 15 0 *5? I v W W UNITED STATES mca.

JOHN M. HOUGHTON, or woncns'rna, MASSACHUSETTS, AssIo oaro nou'q b MANUFACTURING COMPANY, A CORPORATION or mas'secnnsnr'rs.

DOFFING-RAIL LOOK FOR SPINNING FRAMES.

Specification of Letters Patent. Patgnted Apr. 4 1.9.2.2

' Application filed May 28, 192i). Serial No; 384,805.

- Frames, of which the following is a specification.

This invention relates to a device for antomatically locking the dofiing rail of a spinning frame in raised balanced position and preventing it from being raised too far. The principal object-s thereof are to provide a device for this purpose of an extremely simple and inexpensive construction. and with no partsthat are likely to get out of order or that will be in the way of the proper operation of the frame; and to pro-.

vide a construction which can be unlocked readily by a very simple motion to allow the doffing rail to be turned down to its normal horizontal position.

Reference is to be had to the accompany ing drawings in which Fig.1 is a plan of frame thread board showing a preferred embodiment of this invention applied thereto;

Fig; 2 is a front elevation of the same with parts broken away to show interior construction r Fig. 3 is a side View with parts shown in section on the line 33 of Fig. 1,- and in normal horizontal position; Fig-4; is a similar view showing the position of the parts when locked c Fig. 5 is a section on the line -5'5 of Fig. 2; i v

Fig. 6 is a bottom plan'view of a" bracket for supporting the locking member. and

Fig. 7 is afront elevation thereof. Difliculty is encountered in operating spinning frames from. the fact that when the dofiing rail is to be raised for dotting, the operator. is apt to turn it up to its extreme position. This brings the yarn into a nearly straight path from the bobbins to the drawing rolls. Then when the rail is turned down again the yarn is directed in an angular course which stretches it and has a tendency to cause it to break. 7 v p This invention is designed to overcome that difliculty and at the same time do it in an extremely simple manner and without complicated or expensive attachments.-

a part of a spinning- The invention is shown as applied to a spinning frame having a dofiing'rail 10 pivoted on studs 1 1 carried by brackets 12 some distance in front of the roller beam 9 so that- 1t can move from the horizontal operatin'p' position shown in Fig. 3to the elevated position for dotting shown in Fig." 4. i

' This invention is shownina form involving a single locking device for the entire dotting ra1l and comprising a bracket 15' usually formed of sheetm etaland attached to the bottom of the dotting rail. "This bracket is provided with depending lugs 16 which are perforated to provide bearings separated from each other: for a pivot pin 1 7 which pivotally supports the locking member 18. This is made from a plain flat stamping of sheet metal and has a depending portion 19 provided with a notch'2O at the rear and with an inclined surface2l at the front. It is also provided with a 'handle 22 which also constitutes an operatingweight as will appear. Y

The locking device comprises another 'element in the form of a sheet metal stamping 24 secured to the front of the roller beam adjustably by'means of a bolt 2501* the like passing throughaslot 26 with'which it is provided in its vertical or main portion It I also has a-slanting projection 27 extending In operation when the parts are in normal positionthe lower guide 23 on the bottomof the locking membeyrests in the perforation 28 and holds the member in its forward position as shown in Fig. 3. It will be.ob-

served that the entire weight of this locking member is on one side of the pivot pm 17;

and consequently this weight tends to move it 'backwardlyabout its pivot. The proj ecting handleand weight 22 provide'a material weight for tending toswing it back by graveity, and therefore when the dofiing rail 10 is turned upwardly on its pivot, from any point along it, its inner end will swing down and bring down with it the pivot pin 17 This lowers the locking member sufiiciently so that the notch 20 will come into the perforation 28; Immediately upon that change in position the weight of the part '22 forcesthe member 18 to swing backward by gravity and bring the notch to the end of indicated in Fig. 4 because of the slanting I nature of the projection 27. V

swinging motion of the parts will always bring the notch 20 back to the rear of the slot 28. Gravity acts to keep it there as will be seen.

It is not possible therefore to raise .the thread board too fa and then run the risk of breaking the yarn when it is lowered again. v 1

In order to turn it down, it is necessary to touch the locking member and raisethe handle 22. That action in itself brings the notch 20 up out of the slot 28 so that it will no longer lock by gravity because the force applied, to the handle 22 slightlyraises the pivot 17 .andbrings the notch up so that it cannot look again by gravity until it is lowered. Now the operator can restore the dofiing rail to its'horizontal position as shown in Fig. ,3.

Although I have illustrated and described only a single form of the invention, I am aware of the fact that modifications can be made therein by persons skilled in the art without'departing from the scope of the invention as expressed in the claims. Therefore I do not wish to-be limited to all the details; of construction herein shown and described, but what I do claim is 1. The combination with a pivoted doffing rail for a spinning frame of means movable therewith for automatically and positively looking it against further upward motion uponvits' being moved to a raised position for'dofiing in which it is substantially balanced on its pivots.

2. The combination with a doiiing rail pivoted on an axis near its front edge, of a slotted plate located below it, and a locking member pivotally connected with the dofiing rail 'and having a notch providedwwi-th abrupt opposite edges forpen'gaging both sides of said plate and locking the dofiing The slight.

axis on which it turns, a locking member pivotally depending from said pivot, and stationary means below the dofiing rail adapted to be engaged by the locking member to lock the dofling rail automatically whenever it is raised to a balanced position.

4. The combination with a pivoted dofling rail, of a pivoted locking member having an arm projecting forwardly therefrom con stituting means for operating it by the force of gravity and also constituting a weight for holding said member in looking position, and stationary means below the dofiing rail adapted to be engaged by the locking member to lock the clotting rail automatically whenever it is raised to its balanced position.

5. The combination with a tilting dotting. rail, of a slotted plate located below it, and a locking member pivotally connected with the doiiing rail for engaging said plate and locking the doiling rail in raised position, said locking member consisting of a flat piece of sheet metal having a forwardly projecting weighted arm for manipulating it.

6. The combination with a pivoted dofiing rail for a spinning frame, of a gravity actuated lock for holding it in its upwardly turned position for dofling, comprising *a freely depending member having an operating arm projecting forwardly and adaptedv when lifted to unlock the device and initiate the return of the doifing rail to a horizontal position. 7 y

7. The combination with a tilting doifing rail for a spinning frame, of means for automatically looking it in raised position, said locking device comprising amember having a. passage therein and a flatpiece of sheet metal pivotally [depending from the rear edge of thedofiing rail and having a notch in its rear side above'its lower-end for engaging in said passage, and having a guide extending below said notch and provided with a slanting front surface just JOHN M. HOUGHTON.

I have hereunto 

